[The time course of changes in early postoperative echocardiographic parameters in patients after reparative operations on the left ventricle and coronary bypass surgery].

The echocardiographic functional features of the left ventricle after its geometrical reconstruction in combination with myocardial revascularization were studied in 31 patients. The most significant parameters were defined, by evaluating the course of an early postoperative period.

[Urban air pollution by carcinogenic N-nitrosamines].

Moscow is used as an example to discuss the problem of urban atmospheric pollution by carcinogenic N-nitrosamines. An analytical method is proposed, which is based on the use of a Russian gas chromatograph compatible with a chemiluminescence detector, that is a TEA thermal energy analyzer (USA) having some modifications to reduce the time of analysis and loss during sample pretreatment. The minimal detected concentration is 3 ng/m3 for 2-hour sampling.